Question # 1

The average life span of RBCs is.

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110 days

115 days

118 days

120 days

The tissues used ot conduct water in plants are.

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Phloem tissue

Leaf

Xylem tissue

Stem

------------- in mouth has antiseptic property and kills microogansms in food.

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Tongue

Teeth

Saliva

Trachea

Bacteria move with the help of.

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DNA

Legs

Arm

Flagella

Billins of new blood cells are produced daily in

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Heart

Lever

Spleen

Bone -marrow

When water molecule gain a proton it form

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H+

OH-

H3O

H2O

Rusting of iron takes place in the presence of.

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Moisture

O2

Both moisture and O2

Dry air

Blue and ..... lifht is absorbed by chlorophyll.

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Yellow

Orange

Red

White

Value of g on moon is

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1.6 N/kg

16 N /kg

10 N/g

1 N/kg

The Earth's pull on the objects is called.

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Gravity

Frictional force

Electrostatic force

Magnetic force

Product fo combustion is.

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C

O2

CO2

All of these

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